Here is the full list of all 28 Organ Trail: Director's Cut achievements.
Get attacked by zombies 20 times during scavenging.
Your party dead, you made it to Safe Heaven alone.
Make it to Safe Heaven without starting with any money or selling anything.
Make it to Safe Heaven without starting with any food or buying any food.
Beat the game on hard.
Scavenge more than double the supplies you can carry.
Survive all 3 boss encounters.
Find your own grave.
The station wagon breaks down 4 times during the trip.
Successfully forde a horde of zombies 3 times.
Kill 500 zombies
Beat the game without trading anything on the road.
Kill all the other members of your party while they are healthy.
Put down an infected party member who has passed out.
Don't pull the trigger
Kill 25 zombies without missing a shot.
Stop at 50 tombstones.
Make it to Safe Haven with George Romero in your party.
[Secret] sacrifices himself for the greater good.
Fully upgrade your station wagon.
Investigate 30 points of interest.
Use 50 medkits
Someone died of dysentery.
Have $1000 on you.
Always choose to shoot your way through zombie hoardes.
Kill "Ryan" at the start of a game.
Become a zombie.
Beat the game five times.